[chore]: Bump github.com/coreos/go-oidc/v3 from 3.9.0 to 3.10.0 (#2779)

vendor/github.com/go-jose/go-jose/v4/jwe.go

@@ -0,0 +1,381 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jose
+
+import (
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/go-jose/go-jose/v4/json"
+)
+
+// rawJSONWebEncryption represents a raw JWE JSON object. Used for parsing/serializing.
+type rawJSONWebEncryption struct {
+	Protected    *byteBuffer        `json:"protected,omitempty"`
+	Unprotected  *rawHeader         `json:"unprotected,omitempty"`
+	Header       *rawHeader         `json:"header,omitempty"`
+	Recipients   []rawRecipientInfo `json:"recipients,omitempty"`
+	Aad          *byteBuffer        `json:"aad,omitempty"`
+	EncryptedKey *byteBuffer        `json:"encrypted_key,omitempty"`
+	Iv           *byteBuffer        `json:"iv,omitempty"`
+	Ciphertext   *byteBuffer        `json:"ciphertext,omitempty"`
+	Tag          *byteBuffer        `json:"tag,omitempty"`
+}
+
+// rawRecipientInfo represents a raw JWE Per-Recipient header JSON object. Used for parsing/serializing.
+type rawRecipientInfo struct {
+	Header       *rawHeader `json:"header,omitempty"`
+	EncryptedKey string     `json:"encrypted_key,omitempty"`
+}
+
+// JSONWebEncryption represents an encrypted JWE object after parsing.
+type JSONWebEncryption struct {
+	Header                   Header
+	protected, unprotected   *rawHeader
+	recipients               []recipientInfo
+	aad, iv, ciphertext, tag []byte
+	original                 *rawJSONWebEncryption
+}
+
+// recipientInfo represents a raw JWE Per-Recipient header JSON object after parsing.
+type recipientInfo struct {
+	header       *rawHeader
+	encryptedKey []byte
+}
+
+// GetAuthData retrieves the (optional) authenticated data attached to the object.
+func (obj JSONWebEncryption) GetAuthData() []byte {
+	if obj.aad != nil {
+		out := make([]byte, len(obj.aad))
+		copy(out, obj.aad)
+		return out
+	}
+
+	return nil
+}
+
+// Get the merged header values
+func (obj JSONWebEncryption) mergedHeaders(recipient *recipientInfo) rawHeader {
+	out := rawHeader{}
+	out.merge(obj.protected)
+	out.merge(obj.unprotected)
+
+	if recipient != nil {
+		out.merge(recipient.header)
+	}
+
+	return out
+}
+
+// Get the additional authenticated data from a JWE object.
+func (obj JSONWebEncryption) computeAuthData() []byte {
+	var protected string
+
+	switch {
+	case obj.original != nil && obj.original.Protected != nil:
+		protected = obj.original.Protected.base64()
+	case obj.protected != nil:
+		protected = base64.RawURLEncoding.EncodeToString(mustSerializeJSON((obj.protected)))
+	default:
+		protected = ""
+	}
+
+	output := []byte(protected)
+	if obj.aad != nil {
+		output = append(output, '.')
+		output = append(output, []byte(base64.RawURLEncoding.EncodeToString(obj.aad))...)
+	}
+
+	return output
+}
+
+func containsKeyAlgorithm(haystack []KeyAlgorithm, needle KeyAlgorithm) bool {
+	for _, algorithm := range haystack {
+		if algorithm == needle {
+			return true
+		}
+	}
+	return false
+}
+
+func containsContentEncryption(haystack []ContentEncryption, needle ContentEncryption) bool {
+	for _, algorithm := range haystack {
+		if algorithm == needle {
+			return true
+		}
+	}
+	return false
+}
+
+// ParseEncrypted parses an encrypted message in JWE Compact or JWE JSON Serialization.
+//
+// https://datatracker.ietf.org/doc/html/rfc7516#section-3.1
+// https://datatracker.ietf.org/doc/html/rfc7516#section-3.2
+//
+// The keyAlgorithms and contentEncryption parameters are used to validate the "alg" and "enc"
+// header parameters respectively. They must be nonempty, and each "alg" or "enc" header in
+// parsed data must contain a value that is present in the corresponding parameter. That
+// includes the protected and unprotected headers as well as all recipients. To accept
+// multiple algorithms, pass a slice of all the algorithms you want to accept.
+func ParseEncrypted(input string,
+	keyEncryptionAlgorithms []KeyAlgorithm,
+	contentEncryption []ContentEncryption,
+) (*JSONWebEncryption, error) {
+	input = stripWhitespace(input)
+	if strings.HasPrefix(input, "{") {
+		return ParseEncryptedJSON(input, keyEncryptionAlgorithms, contentEncryption)
+	}
+
+	return ParseEncryptedCompact(input, keyEncryptionAlgorithms, contentEncryption)
+}
+
+// ParseEncryptedJSON parses a message in JWE JSON Serialization.
+//
+// https://datatracker.ietf.org/doc/html/rfc7516#section-3.2
+func ParseEncryptedJSON(
+	input string,
+	keyEncryptionAlgorithms []KeyAlgorithm,
+	contentEncryption []ContentEncryption,
+) (*JSONWebEncryption, error) {
+	var parsed rawJSONWebEncryption
+	err := json.Unmarshal([]byte(input), &parsed)
+	if err != nil {
+		return nil, err
+	}
+
+	return parsed.sanitized(keyEncryptionAlgorithms, contentEncryption)
+}
+
+// sanitized produces a cleaned-up JWE object from the raw JSON.
+func (parsed *rawJSONWebEncryption) sanitized(
+	keyEncryptionAlgorithms []KeyAlgorithm,
+	contentEncryption []ContentEncryption,
+) (*JSONWebEncryption, error) {
+	if len(keyEncryptionAlgorithms) == 0 {
+		return nil, errors.New("go-jose/go-jose: no key algorithms provided")
+	}
+	if len(contentEncryption) == 0 {
+		return nil, errors.New("go-jose/go-jose: no content encryption algorithms provided")
+	}
+
+	obj := &JSONWebEncryption{
+		original:    parsed,
+		unprotected: parsed.Unprotected,
+	}
+
+	// Check that there is not a nonce in the unprotected headers
+	if parsed.Unprotected != nil {
+		if nonce := parsed.Unprotected.getNonce(); nonce != "" {
+			return nil, ErrUnprotectedNonce
+		}
+	}
+	if parsed.Header != nil {
+		if nonce := parsed.Header.getNonce(); nonce != "" {
+			return nil, ErrUnprotectedNonce
+		}
+	}
+
+	if parsed.Protected != nil && len(parsed.Protected.bytes()) > 0 {
+		err := json.Unmarshal(parsed.Protected.bytes(), &obj.protected)
+		if err != nil {
+			return nil, fmt.Errorf("go-jose/go-jose: invalid protected header: %s, %s", err, parsed.Protected.base64())
+		}
+	}
+
+	// Note: this must be called _after_ we parse the protected header,
+	// otherwise fields from the protected header will not get picked up.
+	var err error
+	mergedHeaders := obj.mergedHeaders(nil)
+	obj.Header, err = mergedHeaders.sanitized()
+	if err != nil {
+		return nil, fmt.Errorf("go-jose/go-jose: cannot sanitize merged headers: %v (%v)", err, mergedHeaders)
+	}
+
+	if len(parsed.Recipients) == 0 {
+		obj.recipients = []recipientInfo{
+			{
+				header:       parsed.Header,
+				encryptedKey: parsed.EncryptedKey.bytes(),
+			},
+		}
+	} else {
+		obj.recipients = make([]recipientInfo, len(parsed.Recipients))
+		for r := range parsed.Recipients {
+			encryptedKey, err := base64.RawURLEncoding.DecodeString(parsed.Recipients[r].EncryptedKey)
+			if err != nil {
+				return nil, err
+			}
+
+			// Check that there is not a nonce in the unprotected header
+			if parsed.Recipients[r].Header != nil && parsed.Recipients[r].Header.getNonce() != "" {
+				return nil, ErrUnprotectedNonce
+			}
+
+			obj.recipients[r].header = parsed.Recipients[r].Header
+			obj.recipients[r].encryptedKey = encryptedKey
+		}
+	}
+
+	for i, recipient := range obj.recipients {
+		headers := obj.mergedHeaders(&recipient)
+		if headers.getAlgorithm() == "" {
+			return nil, fmt.Errorf(`go-jose/go-jose: recipient %d: missing header "alg"`, i)
+		}
+		if headers.getEncryption() == "" {
+			return nil, fmt.Errorf(`go-jose/go-jose: recipient %d: missing header "enc"`, i)
+		}
+		err := validateAlgEnc(headers, keyEncryptionAlgorithms, contentEncryption)
+		if err != nil {
+			return nil, fmt.Errorf("go-jose/go-jose: recipient %d: %s", i, err)
+		}
+
+	}
+
+	if obj.protected != nil {
+		err := validateAlgEnc(*obj.protected, keyEncryptionAlgorithms, contentEncryption)
+		if err != nil {
+			return nil, fmt.Errorf("go-jose/go-jose: protected header: %s", err)
+		}
+	}
+	if obj.unprotected != nil {
+		err := validateAlgEnc(*obj.unprotected, keyEncryptionAlgorithms, contentEncryption)
+		if err != nil {
+			return nil, fmt.Errorf("go-jose/go-jose: unprotected header: %s", err)
+		}
+	}
+
+	obj.iv = parsed.Iv.bytes()
+	obj.ciphertext = parsed.Ciphertext.bytes()
+	obj.tag = parsed.Tag.bytes()
+	obj.aad = parsed.Aad.bytes()
+
+	return obj, nil
+}
+
+func validateAlgEnc(headers rawHeader, keyAlgorithms []KeyAlgorithm, contentEncryption []ContentEncryption) error {
+	alg := headers.getAlgorithm()
+	enc := headers.getEncryption()
+	if alg != "" && !containsKeyAlgorithm(keyAlgorithms, alg) {
+		return fmt.Errorf("unexpected key algorithm %q; expected %q", alg, keyAlgorithms)
+	}
+	if alg != "" && !containsContentEncryption(contentEncryption, enc) {
+		return fmt.Errorf("unexpected content encryption algorithm %q; expected %q", enc, contentEncryption)
+	}
+	return nil
+}
+
+// ParseEncryptedCompact parses a message in JWE Compact Serialization.
+//
+// https://datatracker.ietf.org/doc/html/rfc7516#section-3.1
+func ParseEncryptedCompact(
+	input string,
+	keyAlgorithms []KeyAlgorithm,
+	contentEncryption []ContentEncryption,
+) (*JSONWebEncryption, error) {
+	parts := strings.Split(input, ".")
+	if len(parts) != 5 {
+		return nil, fmt.Errorf("go-jose/go-jose: compact JWE format must have five parts")
+	}
+
+	rawProtected, err := base64.RawURLEncoding.DecodeString(parts[0])
+	if err != nil {
+		return nil, err
+	}
+
+	encryptedKey, err := base64.RawURLEncoding.DecodeString(parts[1])
+	if err != nil {
+		return nil, err
+	}
+
+	iv, err := base64.RawURLEncoding.DecodeString(parts[2])
+	if err != nil {
+		return nil, err
+	}
+
+	ciphertext, err := base64.RawURLEncoding.DecodeString(parts[3])
+	if err != nil {
+		return nil, err
+	}
+
+	tag, err := base64.RawURLEncoding.DecodeString(parts[4])
+	if err != nil {
+		return nil, err
+	}
+
+	raw := &rawJSONWebEncryption{
+		Protected:    newBuffer(rawProtected),
+		EncryptedKey: newBuffer(encryptedKey),
+		Iv:           newBuffer(iv),
+		Ciphertext:   newBuffer(ciphertext),
+		Tag:          newBuffer(tag),
+	}
+
+	return raw.sanitized(keyAlgorithms, contentEncryption)
+}
+
+// CompactSerialize serializes an object using the compact serialization format.
+func (obj JSONWebEncryption) CompactSerialize() (string, error) {
+	if len(obj.recipients) != 1 || obj.unprotected != nil ||
+		obj.protected == nil || obj.recipients[0].header != nil {
+		return "", ErrNotSupported
+	}
+
+	serializedProtected := mustSerializeJSON(obj.protected)
+
+	return base64JoinWithDots(
+		serializedProtected,
+		obj.recipients[0].encryptedKey,
+		obj.iv,
+		obj.ciphertext,
+		obj.tag,
+	), nil
+}
+
+// FullSerialize serializes an object using the full JSON serialization format.
+func (obj JSONWebEncryption) FullSerialize() string {
+	raw := rawJSONWebEncryption{
+		Unprotected:  obj.unprotected,
+		Iv:           newBuffer(obj.iv),
+		Ciphertext:   newBuffer(obj.ciphertext),
+		EncryptedKey: newBuffer(obj.recipients[0].encryptedKey),
+		Tag:          newBuffer(obj.tag),
+		Aad:          newBuffer(obj.aad),
+		Recipients:   []rawRecipientInfo{},
+	}
+
+	if len(obj.recipients) > 1 {
+		for _, recipient := range obj.recipients {
+			info := rawRecipientInfo{
+				Header:       recipient.header,
+				EncryptedKey: base64.RawURLEncoding.EncodeToString(recipient.encryptedKey),
+			}
+			raw.Recipients = append(raw.Recipients, info)
+		}
+	} else {
+		// Use flattened serialization
+		raw.Header = obj.recipients[0].header
+		raw.EncryptedKey = newBuffer(obj.recipients[0].encryptedKey)
+	}
+
+	if obj.protected != nil {
+		raw.Protected = newBuffer(mustSerializeJSON(obj.protected))
+	}
+
+	return string(mustSerializeJSON(raw))
+}